Air register



Oct. 26, 1937. E. H. PEABODY 7,

AIR REGISTER Filed Dec. 6, 1954 s Sheets-Sheet 1 INVENTOR ERNEST h. PEABODY BY M m A QRNEY Oct. 26, 1937. R E. H. PEABODY 2,097,078

AIR REGISTER Filed Dec. 6, 1954 3 Sheets-Sheet 2 INVE NTOR' I ERA/57 HPL'ABODY IBYMXM A ORNEY Oct. 26, 1937.

E. PEABODY AIR REGISTER Filed Dec. 6, 1954 3 Sheets-Sheet 3 INVENTOR ERNEST H. PEABOOY A ORNEY Patented Oct. 26, 1937 UNi'i'ED STATES PATENT OFFICE AIR REGISTER Ernest H. Peabody, New York, N. Y.

Application December 6, 1934, Serial No. 756,247

14 Claims.

This invention relates to air registers and particularly to the type disclosed in the Peabody- Patent 1,527,214 of February 24, 1925.

In burners of the type referred to, admission 5 of the air necessary for proper combustion of the fuel is governed by regulation of a series of air doors, which may be simultaneously adjusted for regulating the rotation of the air, and may also be simultaneously adjusted to admit varying amounts of air. This multiplicity of doors may give the entering air a rotary motion for promoting proper mixture with the fuel and for efiecting a smooth even discharge from the burner throat.

For most furnaces, it is desirable and even necessary that the burner flame be substantially circular in outline, so that the heat will be pro-- jected evenly in all directions. The air register of the patent referred to is intended to accomplish this result.

In other furnaces of special design, the operation would be improved if the flame were other than strictly symmetrical.

The objects of the present invention are to provide an air register which will be adaptable to meet such special requirements and which will have simple, practical and effective means for distorting or displacing the flame at will, to meet special furnace requirements, such as to reach particular portions of the furnace which would not be reached by an ordinary symmetrical flame. Also to accomplish this without destroying the air rotation imparted by the main air doors. It may be desired to distort the air flow for other purposes in cases where the register is not used in combination with a fuel admission system.

It is also an object to provide means to control the form of the flame which may be used, if so desired, to render a flame symmetrical which otherwise, due to other causes, would be unsymmetrical.

Other objects of the invention are hereafter set forth or may be apparent from the accompanying specification, claims and drawings.

The drawings show by way of illustration certain preferred embodiments of the invention and what are considered now the best modes of applying the underlying principles. Other em;- bodiments of the invention employing the same or equivalent principles may be used and structural changes made as desired by those skilled in the art without departure from the present invention and within the spirit of the patent claims.

Fig. 1 in the drawings is a broken front elevation and partly sectional View illustrating the invention as incorporated in an air register of the conical type. v

, Fig. 2 is a broken vertical sectional view of the same as on substantially the plane of line 2-2 of Fig. 1.

Fig. 3 is a broken sectional detail illustrating the invention as applied to an air register of the cylindrical type, this View being taken as on substantially the plane of line 33 of Fig. i.

Fig. 4 is a broken side elevation and part sectional View of the parts appearing in Fig. 3.

Fig. 5 is an enlarged broken" sectional view as on line 55 of Fig. 1.

Fig. 6 is a similar view as on line 66 of Fig. 1.

In Figs. 1 and 2, the front and back plates of a conical type register are indicated at 5, 6, connected in spaced relation, by inclined bolts 1, providing the hinge pins for the air doors 8. These parts may be constructed and arranged as in the patent referred to with spacer sleeves 9, surrounding the bolts and hinge lugs Ill, at the ends of the doors, pivoting on the sleeves, details of the same appearing in Figs. 5 and 6.

The air doors are indicated as of sufficient extent to overlap in the closed position and are further indicated as simultaneously operable, as in the patent, by means of pins H, on an adjusting ring l2, operating in slotted inwardly extending lugs 13, at the outer ends of the gates. The adjusting ring is shown as formed with gear teeth l4, engaged by pinion l5, which can be turned by a hand crank IS, on the outer end of the shaft l'l, carrying thepinion.

By turning the hand crank I6, it will be seen that the air doors, which may be either flat, or curved, as shown, may be simultaneously turned on their pivotal supports to admit more or less air through the register and that these doors will impart the desired rotary motion to the entering air.

For securing the air doors in the desired positions of adjustment, a lock nut I8 is provided on the pinion shaft which can be set up tight against a boss I9 on the front plate. Other methods such as a ,self locking worm and wheel arrangement may be employed.

For varying the air admission to suit particular requirements, auxiliary air doors are provided, which may be individually adjusted to regulate the air admitted by the main air doors.

'I-hese auxiliary air doors are designated 20 and they are shown as pivoted on the: same centers as the main air doors and as of a width topar- Individual adjustment of the auxiliary air doors is effected in the construction shown by rods 22,

having cranked ends 23, engaging in slots 39 in flanges 24, at the outer ends of; such doors. These adjusting rods are shown as having screw mounting at 25, in the front plate and as held in individually adjusted relation by lock nuts 26, on the screw portions of said adjusting rods. The adjusting rods are susceptible to control at apoint removed from the burner.

The auxiliary air doors 20, by the construction disclosed may be individually adjusted and secured entirely independently of the main air doors. Thus the main air doors may be opened more or less to change the volume of air admitted without varying the special settings of different auxiliary doors. If with a change in the main air doors the auxiliary air doors require different setting, this can be readily effected without disturbing the main door setting. Fig. 1 illustrates how one or any number of the auxiliary air doors may be entirely or partly closed, while the main doors may be fully opened, partly or fully closed. Hence the burner flame may be deliberately distorted and inclined at will toward different portions of a furnace or if already distorted by some cause may be restored to a symmetrical form.

Fig. illustrates how, when an operating platform plate is placed over the front of the burner as at 21, the means for adjusting and securing the main and auxiliary air doors may be brought out through the front of this plate by tubing 28, 29, of square cross section engaged over the squared ends 30, 3!, of the pinion shaft I! and cranked rods 22, and surrounding larger size square tubing 32, 33, engaged over the lock nuts I8, 26, respectively. In such case, the hand crank l 6 for setting the main doors is fixed on the other end of tubing 28, instead of being directly attached to the pinion shaft ll. The outer ends of tubing 29, for turning the auxiliary door setting cranks may be equipped with suitable heads as indicated at 34, to enable them being readily turned by a hand wrench or the like, and the lock nut securing tubes 32 and 33, may be equipped with suitable wrench heads as indicated at 35, 36. By these operating extensions of square tubing, the main and auxiliary air doors may be readily adjusted and secured to meet any normal or unusual conditions.

Figs. 3 and 4 show how the invention may be applied to an air register of the cylindrical type, where the bolts 1, and the doors supported thereby are parallel, forming portions of a cylinder instead of inclined and forming portions of the frustum of a cone as in the first example considered. Except for this difference in disposition, the parts are substantially the same and corresponding reference characters have therefore been used. In constructions such as shown, the auxiliary air doors may each have a bend in them as indicated at 37, so that in fully closed position they will be clear of the arcs 38, representing the travel of aoszovs' the main doors and hence never interfere with the opening and closing movements of the main air doors. The slotted flanges 24, Figures 1 and 3, serve as reinforcements bracing the bent or angularly related portions of the auxiliary air doors, which 'is an advantage when such doors are made of sheet metal.

To limit the travel of the auxiliary air doors so that they may not block adjustment of the main air doors, the adjusting cranks 23 and cam slots 39 may be proportioned and arranged, as indicated particularly in Fig. 3, so that such cranks in coming to the inner ends of such slots in both extremes of movement will serve as stops limiting both opening and closing movements of the auxiliary doors.

Operation By adjustment of the single control represented by the hand crank [6, Figs. 1 and 6, the main air doors 8, may all be simultaneously shifted to vary the total volume of air admitted by the register. Then by adjustment of selected auxiliary air doors 20, through the medium of the crank and cam slot connections 23, 24, the amount of air actually admitted at any point around the circumference of the register may be modified and controlled and hence more or less air be fed to different sides of the flame. Control of the flame can thus be effected at will. If in trimming down the air at one side the total volume is reduced too much, then the main air doors may be opened more and this without disturbing the setting which may have been given certain or all of the auxiliary air doors. In corresponding fashion, if a setting of the main air doors disturbs the effect of the auxiliary air doors, then the latter may be adjusted without touching the adjustment of the main air doors. The adjusting cranks 23, by limiting the extent of swing of the auxiliary air doors, serve as convenient stops, preventing these auxiliary doors from obstructing or interferring with adjustment of the main air doors. The auxiliary doors being mounted on the same centers as the main air doors and lying close to the backs of the main doors in the fully open relation, offer no material obstruction to the inflow of air. Also, as will be clear, the addition of the auxiliary air doors does not limit or change the usefulness of the air register for either natural draft or for forced draft as when used with a wind box as indicated at 39, in Fig. 2. When air registers are installed in a wind box, there may be an unequal distribution of air in the box, depending upon the point and method of admitting the air to the box. Under these conditions, the auxiliary doors may be used effectively for securing a proper flow of air into the registers. The construction also is of such a character, that if found desirable or necessary, one or any number of the auxiliary air doors may be omitted and for some installations, the register be made up with only a limited number of the auxiliary air doors, as for example, one auxiliary air door associated with every alternate main air door.

The parts are of simple substantial construction, well adapted to the accomplishment of the objects set forth and such parts furthermore are readily applicable to existing structures.

The square tubing 28, 32 and 29, 33, for operating and securing the main and auxiliary air doors can be quickly applied or removed, as will be clear from Figs. 5 and 6. While tubing of full length square cross-section is illustrated, it will be apparent that circular or other cross-sectional all) shape tubing may be employed with the inner ends of the same squared or otherwise properly shaped to fit over the head portions 30, I8 and 3|, 26 of the door shifting and securing devices The auxiliary air doors may be designed so as to be capable of either wholly or only partially closing the air passages controlled by the main air doors.

Other modifications and changes are possible all within the true spirit and broad scope of the claims.

What is claimed is:

1. An air register for burners, comprising main and auxiliary air doors pivotally mounted on the same centers, means for simultaneously adjusting all of the air doors of the one kind and means for individually adjusting the air doors of the other kind.

2. An air register for burners, comprising main and auxiliary air doors pivotally mounted on the same centers, means for rocking the main'air doors on said centers and means for independently rocking the auxiliary air doors on said same centers.

3. An air register for burners, comprising pivotally mounted main air doors standing in overlapping relation in the closed position of the same, auxiliary air doors shiftable independently of said main air doors to partially or substantially fully close the spaces between the main air doors in the open position of the latter and means for individually positioning and securing different auxiliary air doors in different positions with respect to said main air doors.

4. An air register for burners, comprising pivot bolts, a series of main air doors mounted on said pivot bolts and controlling passage of air through said air register and auxiliary air doors mounted on said same pivot bolts, adjustable on said pivot bolts independently of the adjustment of the main air doors thereon and cooperable with said main air doors to vary the air flow controlled by said main air doors.

5. An air register for burners, comprising pivot bolts, a series of main air doors mounted on said pivot bolts and auxiliary air doors mounted on said same pivot bolts and foldable thereon in closely overlying relation over the outside of said main air doors.

6. An air register for burners, comprising pivoted main air doors, pivoted auxiliary air doors for closing the spaces between the main air doors and cranked members having connections with the auxiliary air doors to limit adjustment of the auxiliary air doors to non-interfering positions with respect to adjustment of the main air doors.

'7. An air register for burners, comprising pivoted main air doors, pivoted auxiliary air doors for closing the spaces between the main air doors and cranked members having connections with the auxiliary air doors to limit adjustment of the auxiliary air doors to non-interfering positions with respect to adjustment of the main air doors, said connections including flanges on the auxiliary air doors slotted to receive the cranked connections and positioned to serve as stops limiting} the turning movement of the cranked members.

8. An air register for burners, comprising circumferentially arranged adjustable main air doors and pivoted auxiliary air doors operable in the spaces between the main air doors and hav-- ing end portions angularly related to the balance of the same to provide clearance for free operation of the main air doors.

9. An air register, comprising main and auxiliary air doors, concentrically disposed control means for setting and securing the main air doors, said means having angular head portions, concentrically arranged control means for setting and securing the auxiliary air doors having angular head portions, and operating extensions including concentrically disposed tubing having angular inner end portions fitting the angular head portions of the main air door control means and concentrically arranged tubing having inner angular end portions fitting the angular head portions of the auxiliary air door control means.

10. An air register for a burner, comprising a register casing of substantially circular crosssection having air passages about the periphery of the same, an annular series of curved main air doors adjustable to vary the air admitted through said passages about the periphery of said register casing and auxiliary air doors positioned to control said same air passages but adjustable independently of each other and independently of said main air doors to modify the flow of air controlled by said main air doors.

11. An air register for a burner, comprising a register casing having air passages about the peripheral portion of the same, an annular series of curved main air doors adjustable to control flow of air through said passages, auxiliary air doors positioned to control said same air passages and adjustable for modifying the flow of air controlled by said main air doors, means for adjustably setting said main air doors and means for variously setting said auxiliary air doors independently of said main air doors.

12. An air register for a burner, comprising a register casing, a circumferential series of main air doors on said register casing, means for simultaneously adjusting said main air doors, a circumferential series of auxiliary air doors shiftable over said main air doors to control the air passages governed by said main air doors and means for individually setting and securing said auxiliary air doors independently of the adjustment of said main air doors.

13. An air register for a burner, comprising a register casing, a series of main air doors pivotally mounted on said register casing and a series of flow modifying auxiliary air doors pivotally mounted for adjustment on the same centers as said main air doors.

14. An air register for burners, comprising a register casing having front and back plates held by spacers in spaced relation, main air doors pivoted on said spacers and auxiliary air doors pivotally mounted on said same spacers.

ERNEST H. PEABODY. 

